Answer:
Crimper
Explanation:
The tool that is used to join the connector with the cable is called crimper. It join the two pieces of metals, such as a connector and the cable both of them are metal. In computer networking this tool is used by technicians to join the cable with the connector for the provision of connection to the client.
So, the technician should use crimper tool in order to sealing a RJ-45 connector to the end of the Ethernet cable.